Dental flask



Aug. 14, 1928.

msmw W. J. CLARK ET AL DENTAL FLAS K Filed Aug. 22, 1927 2 Sheets-Sheet l INVENTOR. Walter J. Clark gvzzzmm M. Bomz'ne m\\\\\ I I I L2? ATTORNEY.

Aug. 14, 1928. mamm I w. .J. CLARK ET AL DENTAL FLASK -Filed Aug. 22, 1927 2 Sheets-$heet 2 INVENTOR. Walter J. Clark YWzllzam JVI. Famine B A TTORNE Fatentecl Aug. 14, i928.

UNETE 2 inset FEE.

V WALTER J. CLARK AND WILLIAM M. ROICEIN E, OF WIGHITA, KANSAS.

DENTAL FLASIK.

Application filed August 22, 1927. Serial No. 214,732.

The invention relates to a dental flask composed of five elements and relates to that class of device described and claimed in our Patent #1,500,155 July 8, 1924: to which reference is made. The present invention has similar objects and in addition thereto the present invention refers particularly to a flask holding investment plaster and any plastic material for curing; but more especially for holding condensitc material whose brittleness after curing requires a flask that can be removed from the investment plaster without rapping, leaving the investment and cured material intact. For this purpose we employ a subplate within the flask and a particular arrangement of elements susceptible of ready disassemblage when desired.

In the drawings: Fig. 1 shows a top view of our improved device. Fig. 2 is similar to Fig. 1 with the lid removed. Fig. 3 is a side view of Fig. 1. Fig. 4 is a rear view of Fig. 1. Fig. 5 shows a sectional view as taken along the line VL-VI Fig. 1 looking in the direction. of the arrows. Fig. 6 i similar to Fig. 2 with the upper sections removed to show the base elements more fully. Fig. 7 is a sectional view. as taken along the line VIII-VIII Fig. 2. Similar numerals of reference indicate corresponding parts throughout all the figures of the drawings.

Referring to the drawings; 10 is the top lid having vents 11 and positioning lugs 12 and 13 which seat at 14: and 15 in notches in the top members 16 and 17. In our prior patent the top member 6 therein disclosed is here made in two sections 16 and 17, splitting vertically along the axis 18. The screws 19 and 20 clamp. the portions 16-17 together as will be readily understood. This forms a composite top member 1617 having pair of depending lugs 21-22 which engage seats 21' and 22' such asseen in the base member 23. It will be noted that the side walls 24 and 25 Fig. 2 are substantially parallel. member 17 position the parts by contact with and behind elements such as 28 on the part 23.

Guide members 26 and 27 on the V The member 23 has a floor 29 upon which will be noted the loose plate or floor 30 having at the rear the flanged element 31 intermediate the U-shaped side flanged elements 32-32 each'provided with a lip like edge 33. It will be noted that the base 34 of the member 17 covers the flange 33 and rear edge 25 of the bottom 29.

The members 16 and 17 are so flared and fashioned as to make iteasy to split them off of the investment plaster without rapping. The top 10 is the first removed. Then the screws 19 and 20 are released. This permits the insertion of a pry member at 86 and 37 to tip the part 17 backward, releasing it from the investment posteriorally from line 18. A pry at 38 breaks the part 16 from the investment anteriorally from the line 18, permitting parts 16 and 17 to be lifted from part 29. Then the cementitious element can be lifted otl the base 29 with the part 30 as the lifting element as pried at 33. Then it is easy to separate the plaster from the condensite.

Such modifications may be employed as lie within the scope of the appended claims. Having fully described our invention, what we now claim as new and desire to secure by Letters Patent is:

1. In a dental flask, a top member, a base member and a composite central member comprising a forward and rear pair of elements in separable relationship, and false floor elements carried above the base memher.

2. In a dental flask; a base element; a false floor having a flanged edge portion supported above the base element; a central element composed of a forward side element and a rear side element bolted together and susceptible of disassembly; and a top member closing the flask.

In testimony whereof we aflix our signatures.

W/VALTER J. CLARK.

WILLIAM M, ROMINE. 

